Coins collected in hat for drink (6)
I believe the answer is:
tipple
'for drink' is the definition.
(tippling is a kind of drinking)
'coins collected in hat' is the wordplay.
'coins' becomes 'pp' (the abbreviation for pence written twice).
'collected' is an insertion indicator (inserted letters are collected by others).
'in hat' becomes 'tile' (old-fashioned term for a hat. I am not sure about the 'in' bit.).
'pp' placed inside 'tile' is 'TIPPLE'.
Can you help me to learn more?
(Other definitions for tipple that I've seen before include "Snifter" , "Drink (a little but often)" , "Alcoholic liquor" , "where coal is washed" , "fall" .)